House Judiciary Committee Chairman John Conyers Jr. (D-Mich.) and three fellow Democrats want the Department of Justice to investigate civil rights complaints against controversial sheriff Joe Arpaio. The lawmakers, in a letter to Attorney General Eric Holder and Homeland Security Secretary Janet Napolitano sent Friday, are seeking a probe into reports Arpaio has used skin color as a basis to search for illegal immigrants in Arizona. Conyers and Reps. Jerry Nadler (D-N.Y.), Zoe Lofgren (D-Calif.) and Bobby Scott (D-Va.) want to end a federal agreement that allows the Maricopa County Sheriff's Office to enforce immigration laws if the allegations turn...